// 根据文件名后缀区分 文件类型
export function getType(fileName) {
  // 后缀获取
  var suffix = '';
  // 获取类型结果
  var result = '';
  try {
    var flieArr = fileName.split('.');
    suffix = flieArr[flieArr.length - 1];
  } catch (err) {
    suffix = '';
  }
  // fileName无后缀返回 false
  if (!suffix) {
    result = false;
    return result;
  }
  // 图片格式
  var imglist = ['png', 'jpg', 'jpeg', 'bmp', 'gif'];
  // 进行图片匹配
  result = imglist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'image';
    return result;
  };
  // 匹配txt
  var txtlist = ['txt'];
  result = txtlist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'txt';
    return result;
  };
  // 匹配 excel
  var excelist = ['xls', 'xlsx'];
  result = excelist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'excel';
    return result;
  };
  // 匹配 word
  var wordlist = ['doc', 'docx'];
  result = wordlist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'word';
    return result;
  };
  // 匹配 pdf
  var pdflist = ['pdf'];
  result = pdflist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'pdf';
    return result;
  };
  // 匹配 ppt
  var pptlist = ['ppt'];
  result = pptlist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'ppt';
    return result;
  };
  // 匹配 视频
  var videolist = ['mp4', 'm2v', 'mkv'];
  result = videolist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'video';
    return result;
  };
  // 匹配 音频
  var radiolist = ['mp3', 'wav', 'wmv'];
  result = radiolist.some(function (item) {
    return item == suffix;
  });
  if (result) {
    result = 'radio';
    return result;
  }
  // 其他 文件类型
  result = 'other';
  return result;
}
